In this paper an accurate, simplified, reliable mathematical model is developed for flow loop system. The developed model is validated by comparing its output with real time system output. For finding the mathematical model, input and output data are generated by setting long experimentation under normal condition on real time system in open loop configuration. This data is recorded in the process history of Distributed Control System simultaneously. With the help of recorded data model is formulated using system identification approach. It is a single input single output process with manipulating variable as control valve and controlling variable as transmitter. Controller is then developed using Linear Quadratic Gaussian (LQG) controller. The simulation results are compared with the conventional PI controller and have shown that LQG controller is superior controller than PI controller.

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LQG Controller PI Controller Mathematical Model